Ablation damage and temperature rise of metal oil tanks struck by direct lightning

作者：Liu, Yakun; Xia, Hailiang; He, Yuwei; Liu, Quanzhen; Liu, Baoquan; Fu, Zhengcai^*

来源：High Voltage Engineering, 2016, 42(5): 1578-1585.

DOI：10.13336/j.1003-6520.hve.20160412028

• Action integrals
• Constant charges
• Continuing current
• Different components
• Direct lightning
• Lightning currents
• Self-ignition temperature
• Temperature rise

Research on ablation damage and temperature rise of the metal oil tanks struck by direct lightning is the basis for lightning protection of metal oil tanks. We experimentally researched the ablation damage and temperature rise of metal oil tank's common materials steel alloy Q235B and aluminum alloy 3003 caused by direct lightning. Moreover, we analyzed the effects of different components of lightning currents, charge transfer, and action integral on the metal ablation and temperature rise. The results show that the metal ablation damage and temperature rise are distinctly different with the different components of lightning currents. The ablation depth is closely related to charge transfer and the ablation area is closely related to lightning current amplitude. The action integral is meaningless for metal ablation analysis. The temperature rise almost linearly increases with charge transfer. The temperature rise caused by long continuing current is much higher than that caused by other components of lightning currents. The temperature rise caused by long continuing current, whose amplitude is 400 A, can reach 330℃for steel alloy Q235B and 500℃for aluminum alloy 3003 with its thickness 5 mm, which approach the self-ignition temperatures of oil-gas mixture. For constant charge transfer, the temperature rise caused by first stroke is almost as high as continuing current of interval stroke. The temperature rise caused by subsequent stroke can be neglected.

• 出版日期2016
• 单位上海交通大学